[Feature request] Floor and ceiling for rolls

[SherbertLemon64]

I have an ability which means if I roll less than 10 it is a 10 (apart from a nat 1). If there could be ternary operators or a floor function that would be nice.

e.g.

/r fl10d20

fl10d20 = (3=10) = 10

or with a ternary operator but that would be significantly more difficult:

/r x=d20 > 10 ? 10 : x